300 RUM 200 gr Barnes LRX data

I finally found powder and primers to reload. Now I need a recipe. I plan on sticking with Retumbo and rem 9-1/2 M primers. Has anybody used these bullets yet in their 300RUM? If so, what is your results? I have been shooting the 180TTSX bullets for years and love them, but I really want to try these 200 LRX bullets. Thanks